Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
551
Valero Energy
VLO
$92.3B
| $27.2M | 0.02% |
159,424
+90,278
| +131% | +$12.9M |
|
552
CALL
Marriott International
MAR
$97.5B
| $27.2M | 0.02% |
107,800
-46,200
| -30% | -$11.2M |
|
553
PUT
Roblox
RBLX
$35.5B
| $27.2M | 0.02% |
712,200
-792,600
| -53% | -$32.2M |
|
554
PUT
On Holding
ONON
$12.2B
| $27.1M | 0.02% |
766,300
+84,100
| +12% | +$2.57M |
|
555
CALL
Elevance Health
ELV
$84.4B
| $27M | 0.02% |
52,100
-73,500
| -59% | -$36.6M |
|
|
X
556
CALL
DELISTED
US Steel
X
| $27M | 0.02% |
662,000
-1,120,100
| -63% | -$51.3M |
|
557
CALL
Danaher
DHR
$126B
| $26.9M | 0.02% |
126,000
-147,800
| -54% | -$36.1M |
|
558
PUT
SolarEdge
SEDG
$2.91B
| $26.9M | 0.02% |
378,300
-113,000
| -23% | -$8.16M |
|
559
CALL
Expedia Group
EXPE
$31.3B
| $26.7M | 0.02% |
193,500
-54,100
| -22% | -$7.69M |
|
560
CALL
Etsy
ETSY
$7.64B
| $26.6M | 0.02% |
387,100
-318,700
| -45% | -$22.9M |
|
561
PUT
Five Below
FIVE
$11.3B
| $26.6M | 0.02% |
146,500
+29,900
| +26% | +$5.76M |
|
562
CALL
Comcast
CMCSA
$84B
| $26.5M | 0.02% |
611,900
-529,100
| -46% | -$22.8M |
|
563
PUT
AutoZone
AZO
$48.5B
| $26.5M | 0.02% |
8,400
-11,200
| -57% | -$32M |
|
564
CALL
Suncor Energy
SU
$76.4B
| $26.4M | 0.02% |
733,200
+27,600
| +4% | +$929K |
|
565
CALL
Shell
SHEL
$243B
| $26.4M | 0.02% |
394,000
+6,400
| +2% | +$410K |
|
566
CALL
CleanSpark
CLSK
$3.93B
| $26.2M | 0.02% |
1,235,400
+614,100
| +99% | +$8.54M |
|
567
CALL
Fortinet
FTNT
$114B
| $26.2M | 0.02% |
383,100
-474,400
| -55% | -$31.6M |
|
568
CALL
Petrobras
PBR
$122B
| $26.1M | 0.02% |
1,721,700
-1,174,100
| -41% | -$19.1M |
|
569
CALL
Veeva Systems
VEEV
$30B
| $25.8M | 0.01% |
111,400
-22,600
| -17% | -$4.88M |
|
570
CALL
Crocs
CROX
$6.77B
| $25.8M | 0.01% |
179,100
-130,800
| -42% | -$14.9M |
|
571
CALL
VanEck Durable High Dividend ETF
DURA
$38.5M
| $25.7M | 0.01% |
97,100
-64,400
| -40% | -$2M |
|
572
PUT
Cheniere Energy
LNG
$56B
| $25.7M | 0.01% |
159,300
-62,300
| -28% | -$10M |
|
573
CALL
Macy's
M
$6.4B
| $25.5M | 0.01% |
1,277,300
+147,900
| +13% | +$2.86M |
|
574
PUT
Deckers Outdoor
DECK
$14.2B
| $25.5M | 0.01% |
162,600
-24,000
| -13% | -$3.33M |
|
575
PUT
Interactive Brokers
IBKR
$41.7B
| $25.3M | 0.01% |
907,200
+191,200
| +27% | +$4.76M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.